Seismic Design 1

[99491]

Does anyone know where to get more information regarding the seismic design in API 650 appendix E. Mainly information on the mapped maximum earthquake for short periods/ for 1 sec period/ 0 second period and then for the ground acceleration.

Any assistance would be greatly appreciated.

 

[gr2vessels]

For the Australian conditions, you can get all the information needed in the AS 1170;- for other parts of the world, use the appropriate local standards. For United States, use the American standards. For India, use the Indian standards and for Europe, conversely, use the local European standards.
Cheers,
gr2vessels

 

[IFRs]

For the USA, use

http://earthquake.usgs.gov/research/hazmaps/design/

and click on

http://earthquake.usgs.gov/research/hazmaps/design/download.php

then use ASCE 2005 and plug in your zip code.

 

[99491]

Thanks IFR.

Useful programme. Do you know of any such programmes for locations outside the USA?

 

[99491]

Thanks IFR.

Useful programme! Do you know of any such programmes for locations outside the USA?

 

[IFRs]

Not that I know of - sorry!

 

[vesselguy]

99491

I assume you know that Appendix E.4.3 allows you to use load factors from other building codes with its equations. I have to use NBCC and other regional building code to obtain the numbers you mentioned for work in Canada. Hence, I'm sure you can do the same for where ever you're working in by looking them up in that country's building code. good luck.

 

[HTCivil]

An important reminder regarding the use of seismic parameters in appendix E:

If you use the mapped values obtained in the ASCE 7 maps or USGS calculator, be sure to inspect the equations you plug them into. Some of the equations require SITE-SPECIFIC values obtained directly from a detailed geotech report (see E.4.2). For example, there are two sets of equations to calculate spectral acceleration parameters Ai and Ac. E.4.6.1 is for mapped values, and E.4.6.2 is for site-specific. Most of the US may use the mapped values, but tank design here in Southern California nearly always requires site-specific information.